So, i'm trying to get the Akiha route using the walkthrough from the installation.

I pick the choices it says for
Going to the classroom
Eat lunch in class
Get a hold of myself and go to the mansion

However, on the walkthrough it says that a choice should should up that is something about his sister Akiha, but from the third choice, it takes me straight to the 5th choice, and when it asks what i should do at night, the game automatically goes outside, and doesnt give me a choice of going to sleep.

You cannot play the Far Side of the Moon routes (also known asthe back routes, being Akiha, Hisui and Kohaku) before havingfinished at least one Near Side of the Moon route (front route,being Arcueid or Ciel). You also cannot proceed to Kohaku'sstoryline without having finished Hisui's.

You can play the Maids routes last.
The order I played them was: Arcueid, Ciel, Akiha, Hisui, Kohaku

It's supposed to go Arc, Ciel, Akiha, Hisui, Kohaku, but you can mix up the order fairly easily. The only pre-reqs though are you MUST do Arc/Ciel before Akiha/Hisui/Kohaku, and you MUST do Hisui before Kohaku.

The thing it about the back stroy you could go with Hisui first or second along with Akiha. Although you just need to do I think Hisui's story so you could do Kohaku's, but it's best to do Akiha and then Hisui to have it make some sense in the end. Also, Kohaku kind of wraps the whole thing up rather neetly, and fairly well if you ask me.

You cannot play the Far Side of the Moon routes (also known asthe back routes, being Akiha, Hisui and Kohaku) before havingfinished at least one Near Side of the Moon route (front route,being Arcueid or Ciel). You also cannot proceed to Kohaku'sstoryline without having finished Hisui's.

You can play the Maids routes last.The order I played them was: Arcueid, Ciel, Akiha, Hisui, Kohaku

You can directly go to Akiha's route if you play Arcueid/Ciel route. Just one of them. Thats what I did because I love Akiha so much....